Shake with ice, pour into tall Collins glass. Top with Soda Water. Garnish with lime wheel.

* To make ginger syrup: Combine 4 cups sugar, 2 cups fresh ginger (cut into ⅛-inch slices), and 2 cups water in a medium saucepan over high heat. Bring to a boil. Reduce heat and simmer until syrupy and reduced by half, about 40 to 45 minutes. Strain ginger pieces out and reserve syrup.